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Developer tools
DEVELOPER TOOLS
JSON formatter
Make JSON readable, check its syntax, or compact it for transport. Your data stays in the editor on this device.
Processed on your deviceFree to useNo account needed
Opening your tool…
THREE SIMPLE STEPS
How to use json formatter
- Paste JSON into the input editor.
- Choose indentation and select Format or Minify.
- Copy or download the formatted result.
Good to know
Validation uses the browser JSON parser. Comments, trailing commas and JavaScript expressions are not valid JSON. Like JSON.parse, the tool can lose precision for numeric values outside JavaScript safe-integer limits, and duplicate object keys keep only their last value. Represent exact large identifiers as strings.
A few useful answers
Does it accept JSON with comments?+
No. Comments are not part of standard JSON. Remove them before formatting.
Can I paste sensitive credentials?+
The tool does not upload editor content. Still, avoid putting live credentials into any browser page unless you trust that page and its extensions.